Denshi Jisho — Online Japanese dictionary

製する せいする to make (something)
Suru verb - special class 
製図家 せいずか cartographer
Noun 
精出す せいだす to exert oneself
Godan verb with su ending, Intransitive verb 
制度化 せいどか institutionalization
Noun, Suru verb 
聖なる せいなる holy; sacred
Pre-noun adjectival 
静ひつ せいひつ peacefulness; tranquillity; tranquility
Na-adjective, Noun 
正引き せいびき lookup (e.g. in a dictionary, address list, etc.)
Noun 
整備士 せいびし mechanic
Noun 
生理日 せいりび days of one's menstrual period
Noun 
整理部 せいりぶ copyreading department
Noun 
整理屋 せいりや loan shark who specializes in refinancing debts
Noun 
聖路加 せいろか Saint Luke's (Tokyo Hospital)
Noun 
セイボリー savory (herb)
Noun 
セイリング sailing
Noun 
セイレーン siren (in Greek mythology) (grc: seiren, grc: seirenos)
Noun 
しょうぶん nature; disposition
Common word, Noun 
制球 せいきゅう (pitcher's) control (baseball)
Common word, Noun 
せいきゅう impatience; a quick temper
Common word, Na-adjective, Noun 
請求 せいきゅう claim; demand; charge; application; request; billing (for a service)
Common word, Noun, Suru verb 
政教 せいきょう religion and politics; church and state
Common word, Noun 
正教 せいきょう orthodoxy; (Greek) orthodox church
Common word, Noun 
生協 せいきょう cooperative association; co-op store
Common word, Noun 
盛況 せいきょう success; prosperity
Common word, Noun 
政局 せいきょく political situation
Common word, Noun 
静粛 せいしゅく silent
Common word, Na-adjective, Noun 
青春 せいしゅん youth; springtime of life; adolescent
Common word, Noun, No-adjective 

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